Aerofoil construction



Aug. 11, 1931. L. G. YOUNG AEROFOILCONSTRUCTION Filed June 21, 1929 '5MM/Imi I Lewj Yeung,

%\\\J 7/// N l/ lllllll l|1|\ kill rillLT ,Fl LILVIIIIL 1 l I llrll lll :l F 1 L P hfl III IIIH lllllfl llllll Hllll |l|lHlll|l U.mmaTHHwLv\\\\- f//f/ 1 L. N x T ,N N /./l Q N. llllll \\r Patented Aug. 11, 1931 UNITED STATES PATENT OFFICE AEROFOIL CONSTRUCTIN Appli-cation ined 111115,21, 1929. serial No. 372,652.

This invention relates to aeroplane wings, and more especially to an aileron construe tion.

In my copending applications Serial Nos. 372,650 and 372,651, filed June 2l, 1929, there is disclosed a Wing having a dihedral angle intermediate its ends, and tapering generally to a point at the Wing tip, said tip being preferably generally in line with the trailing edge of the wing. In following out the lines of such a Wing, it is now proposed to provide an aileron which constitutes the tip and adjacent portion of a wing offsuch design.

Other objectsand advantages of the presentinvention will Vbe apparent from the following description of a preferred embodiment of the invention, reference being had to the accompanying drawings, where- 1n:

Figure lis a plan view of the wing and aileron.

Figure 2 is a cross section taken on the line 2 2 of Figure l, and looking in the direction of the arrows.

Figure 3 is a front elevation of the leading spar.

Figure 4 is a front elevation of the trailing spar.

It will be understood that throughout the description the term longitudinal refers to a dimension fore and aft of the aeroplane while lateral means Widthwise or along the wing span thereof.

There is shown at A, a wing having the preferred shape, with spars at a and a and ribs at Z). The leading edge of the Wing is at c and the trailing edge at d. An aileron e With ribs b takes such shape as to carry out the general curvature of the wing. This aileron is secured to a rod f which controls its movements. The rod f is shown attached to the spar a by means of hinges g.

he wing spars shown in Figures 3 and 4 are so constructed that they have dihedral angles intermediate their ends. Moreover, the upper and lower surfaces of the spars determine the longitudinal wing curves. Although the spars are shown as tapering in thickness from points adjacent the fuselage to their outer ends, it will be understood that the wings might also be of constant thickness. The locations and relative lengths of the spars form no. part of the present invention. `The spars may be laterally straight or curved in a lateral plane.

Of course, the size of the aileron and its lateral extent are not limited to the specific embodiment illustrated, but may be varied within the scope of the appended claim.

I claim as my invention:

In a wing having a dihedral angle between its ends and tapering generally in longitudinal dimension to a point, an aileron comprising the wing tip and hinged to the wing with provision for movement in a plane perpendicular to the wing, said aileron conforming to the tapering shape ofthe wing.

This specification signed this 5th day of June A. D. 1929.

LEWIS G. YOUNG. 

